Analogy
| Category | Philosophy |
|---|---|
| Depth | Standard |
| Article type | local Catholic reference article |
Definition
Analogy is the use of a word with meanings that are genuinely related but not identical. A healthy person and healthy food are called healthy in different ways: the person possesses health, while the food supports it. The word is neither a mere coincidence nor an assertion that food is a living patient.
Catholic usage
This lies between univocal and purely equivocal speech. A univocal term keeps the same relevant meaning across its instances. A purely equivocal word merely happens to sound the same in unrelated uses, as with different meanings of “bank.” Analogical uses have an intelligible connection that must be explained.
Catholic theology uses analogy when calling both God and creatures good, wise or living. It affirms something real about God without making divine wisdom a limited quality acquired by study. It also rejects the opposite extreme in which such words tell us nothing about God at all.
Doctrinal context
Aquinas begins from the relation between effects and their cause. A creature's perfection can reveal something about the source that makes it possible, without representing that source adequately. Our language therefore affirms a perfection, removes the creaturely limitation, and recognises that its divine manner exceeds our comprehension.
For example, human wisdom involves real understanding, but is acquired, partial and sometimes lost. When theology attributes wisdom to God, it does not attribute ignorance overcome by lessons. It affirms understanding while denying those limitations. The word retains intelligible content; it is not a cipher for its own opposite.
The familiar healthy-food example illustrates related predication, but it does not exhaust divine analogy. Nor can an analogy on its own prove that its object exists. A comparison may explain a claim once a real relation has been established; it cannot manufacture that relation from resemblance alone.
Distinctions and safeguards
Analogy differs from a convenient metaphor. A metaphor transfers an image, while some analogical names intend a perfection truly present in different modes. Both kinds of speech can be useful, but their claims differ. A supposed analogy also fails if its relevant connection is never identified.
Does analogy let someone change the meaning whenever challenged?
No. The speaker must state what is affirmed, what limitation is denied and why the relation warrants the use. Calling God good cannot reasonably mean that cruelty as cruelty becomes admirable when attributed to him. Analogical speech preserves the intelligible perfection while recognising a different mode of possessing it. Otherwise it collapses into equivocation and cannot support an argument.